How much copper is found on the ocean floor?

The ocean floor contains an estimated 500 billion metric tons of copper, primarily found in polymetallic nodules and seafloor massive sulfide deposits. However, the concentration of copper in these deposits varies significantly, and only a small fraction is economically viable for extraction. Exploration and mining technologies are still being developed to assess the full potential of copper resources on the ocean floor. Overall, while substantial, the exact quantity remains uncertain and is subject to ongoing research.